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Finding the Fourth Proportional to 118,020.88, 176,939.16 and 80,487.91

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Solution

The fourth proportional to 118,020.88, 176,939.16 and 80,487.91 is: 120,669.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,020.88 : 176,939.16 = 80,487.91 : x
  2. Step 2: Convert to fraction form
    118,020.88/176,939.16 = 80,487.91/x
  3. Step 3: Cross multiply
    118,020.88x = 176,939.16 × 80,487.91
  4. Step 4: Simplify right side
    118,020.88x = 14,241,463,185.56
  5. Step 5: Solve for x
    x = 14,241,463,185.56/118,020.88
  6. Step 6: Final answer
    x = 120,669.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.